1904. 



NATURAL SCIENCES OF PHILADELPHIA. 



593 



The radula is Muricoid, the rhachidian tooth very wide, straight, 

 with a long curved central cusp inserted far forward, and on each 

 side there are two adjacent side cusps, the outer ones larger. Lateral 

 teeth with a single slender cusp. 

 Type, M. hradeatus (Hinds). 

 The shell in this genus has much the appear- 

 ance of the Buccinoid Tritonidea. 



Maculotriton differs from Occndrnt (type a-ina- 

 cca L.) in the form of the central teeth of the 

 radula, which in Ocenchra have a very character- 

 istic structure. The dentition in our new genus 

 agrees with that of Trophori dathratus as figured by y^^ i.— Apex of 

 Troschel f but the conchological characters of these Macxdotriton digi- 



, . , • J ?;' 7 ,. /«/j.S (KVC), V 111 lb. 



Indo-Pacific snails bar then' entrance mto / w])h<ni 

 or fi()n'()(ro})Ii,on. 



Fig. 2. — MacalotrUon, digitalis 

 (Rve.), Hahajima, Ogasawara (87,491, 

 A. N. S. P.). 



Fig_ :i. -^Maculotriton bractcatm^ 

 (HdsO var., Hilo, Hawaii (85,843, 



A. N. s. r.). 



Tlie following species belong to Maculotriton: 

 Maculotriton digitalis (Rve.). Triton (UgitaUs Reeve, Covrh. law., 



TI, PI. 19, fig. 86. 

 Maculotriton hradeatus (Hinds). Triton hradeatus Hinds, Zool. " Svl- 



plmr," Moll., p. 11, PI. 4, figs. 5, 6. 

 Maculotriton hradeatus lativaricosvs (Rve.). Triton lativaricosus 



Reeve, Conch. Icon., II, PL 19, fig. 90. 

 Maculotriton hradeatus longus Pils. See below. 



Some other species will doubtless be added to the group. Canlharus 

 pundicidatus Dkr. as figured by Sturany* has much the appearance 

 of our group, but its dentition is unknown. Cantharus watcrhousim 

 Braz.,-^ recently figured by Hedley,« may also belong here. 



3 Das Gebiss der Schnecken,Tl. n, fig. U. ,, , ■ ni ^o^ K 



* Gastropoden des Rothen Meeres, in Denkschr. dermath.-rmturwiss. CI. der K. 

 AkadderWissenschaften, LXXIV, p. 242 (34), PL 7, fig. 4. Tryon has suggested 

 that Buccinum senate Desh. is identical with jmndiculatus . 



^Proc Linn. Soc. N. S. Wales XXI, 1896, pp. 345, 818. 



«Proc. Linn. Soc. N. S. Wales, 1899, p. 434, fig. 7. 



38 



