1901.] NATURAL SCIENCES OP PHILADELPHIA. 399 



SOLENIDuE. 

 Solen roseomaculatus n. sp. PL XIX, lig. 13. 



Shell small, thin, moderately curved, the upper aud lower mar- 

 gins parallel, both ends truncated, with rather rounded angles; 

 compressed, open at both ends, glossy and smooth except for faint 

 growth -sti'ite. White with very irregular, more or less confluent pur- 

 plish-roseate maculation throughout, the spots coarser toward the 

 distal end. Beaks roseate. Anterior end obliquely truncate, the 

 margins narrowly expanded or flaring, thickened within. A single 

 prominent, erect tooth in each valve, that in the right valve ante- 

 rior to the other and compressed, that in the left triangular, being 

 buttressed posteriorly. 



Length 31, alt. 6.3, diam. 3.8 mm. 



Hirado, Hizen, western Kiusiu (Mr. Y. Hirase). Types No. 

 80,565 Coll. A. N. S. P., from No. 1,0-14 of Mr. Hirase' s col- 

 lection. 



This rose-variegated little Solen is curved like an Ensis, and has 

 some similarity to S. pidus Philippi,'- S. vaginoides Pbil.^^ non 

 Lam. = S. j^hillppkums Dkr. " and S. asperstis Dkr.'* Solen pic- 

 tus is comparatively shorter and markedly inflated or cyliudric, while 

 the present Japanese species is strongly compressed. *S', pldlippianiis 

 measures 66 by a little over 10 mm. (" 2" 8'" lang, und wenig 

 iiber b'" hoch"), and is thus a narrower shell, and it is more 

 attenuated anteriorly, with smeared coloration, according to the 

 figure. S. aspersua is decidedly more slender, and anteriorly 

 below it is more square-cornered. The proportions of the three 

 species are as follows, the altitude aud diameter being compared 

 with the length: 



Lcii.ijth. Alt. Diam. 



S. roseomaculatus, 1 I ^ of the length. 



S. jihilippianus, 1 — }. " " 



S aspersus, 1 ]■ — -^ " " 



S. jnctm, 1 I i " 



'^Philippi, ZeUschr.f. Malal:, 18iS, p. 17 i. Habitat nuknowii. It has 

 not been figiired, to my knowletlge. 



^^Philippi, Ahhild. v. Beschreib, etc., I, Solen, PI. 1, fig. 3. From ;Xew 

 Holland. 



'* Dunker, Proc. Zool. Soc. Lond , 1861, p. 420, under S. aspersus. 



'^ Dunker, I. c, Australia. The type has been figured in Conch. Icon., 

 XIX, Solen, PI. 7, fig. 'iZa. 



