214 LAND AN'D FKESHWATEU 



This Eormosan form differs, again, from tlie typical Australian 

 Belicarion helence, as I have pointed out above, in the detached 

 position of the shell-lobes. I consider, therefore, sufficient grounds 

 exist for placing formosana var. hypograpta and willeyana in a 

 new subgenus of the Helicarionidae. 



Macrochlamys formosana, Schmacker & Boettger, Nachr. mal. 

 Ges. 1891, p. 149, pi. i. figs. 2 a, 2 b. 



Original description : — "T. modica, anr/uste umhilicata, umhilico -^fj 

 latitudinis testce cequante, convexiuscido-depressa, tenera, valde nitens, 

 pellucida, corneo-Jfavescens ; spira vi.v exserta, convexiuscida ; apex 

 ohtusus. Anfr. 5-5| rapide accrescentea, siitura disfincte appressn, 

 disjuncti, applanati, leviter striatuU, parum distincte spiraliter 

 lineolati, ultimus non descendens, plus qnam duplo latior quam 

 penulttmus 4 altitudinis tes^ke cequans. Apertura ampla obliqua, 

 transverse ovaiis, sat profunde excisa ; peristoma simplex, marginihus 

 reqidariter c>trvatis, columellnri ascendente, summa parte protracto et 

 trianqidariter dilatato, nmhilicum parum ohtegente. 



" Diam. maj. 14|-15g, min. 12|-13, alt. 7-7| mm.; alt. apert. 

 6|-7, lat. apert. 8-9 mm. 



'■'■Hah. Riid Cap von Formosa, am Fiisse des Berge, lebend 

 gesammelt." 



Lamproctstis ? FTJLGiDA, u. sp. (Plate CXY. figs. 3-3/; 

 Plate CXVI. figs. 6, 6 a.) 



Locality. South Formosa (Hirase). 



Shell scarcely perforate, depressedly globose, shining ; sculpture 

 very regularly striate longitudinally, striae fine, wide apart on a 

 smooth surface ; colour pale horny, with a green tinge ; spire sub- 

 conic, rounded at the apex, sides flat : suture rather shallow, 

 adpressed ; whorls 41, increasing regularly ; aperture broadly 

 lunate, almost an arc of a circle on the outer margin; peristome 

 thin ; columellar margin vertical, no reflexion. 



Size : major diam. 9-75, alt. axis 4*0 mm. 



This shell was sent to me by Mr. Hirase as Macrocldamys 

 fidqens, Gude. In order to be sure of the identification, I have 

 been favoured by ^fr. Gude with the loan of his type specimen, and 

 have made a figure of it on same scale (Plate CXYII. fig. 8). It differs 

 very materially in form, the last and antepenultimate whorls being 

 far more globose and tumid; and I think I am safe in separating 

 the Formosan species from that of the Lu-chu Islands. 



Animal (figs. 3 a, 3 6) very dark brown. Foot very long, narrow, 



H. kukenthali and H. h/dmahericus. Kobelt, from the Celebes. But. in these two 

 last the type of radiila is quite different; they have 320 and 602 teeth respec- 

 tively in the row, as against only 95 in H. vUlri/ana. It does not agree with 

 La)7iproci/sfis. as typified by L. surcmen, for in this genus Pfeiffor places 

 several ovo-viviparous species, and we find this last character common to 

 Microcj/dis and Frrtum, Sykes ( = Ei(rt/in/s, Semper). It finds no place in 

 Seniper's group with chitinous papillate structure in the penis — hie ' Reiz- 

 papillen' {^—Pfeudhi'licarion of von Molleudorff: type Helix ceraiodes, Pfr.)." 



