170 



young ones. These young are apparently of the same age and each is 

 provided with a single pair of pedicels near the rear of the body which 

 appeared to rest on the stiff inner skin of the mother's back. The wall 

 of the pedicels as well as that of the body is filled with the character- 

 istic calcareous plates (Fig. 13 — 14). The 5 primary tentacles are just 



indicated. The figures 

 ^^S- l'i will show plainly the 



shape and proportions 

 of the young and their 

 relation to the body of 

 the mother (Fig. 8). 

 This peculiar manner 

 of caring for the young 

 has suggested the spe- 

 cific name selected. 



In conclusion, there 



follows a list of the Ho- 



lothurians now known 



from the Pacific coast 



of America, north of 



Mexico, including the 2 



just described, with the 



localities from which 



they are recorded and 



some remarks as to their status. It is given in the hope that it may 



prove a stimulus to the study of this interesting but somewhat neglected 



group of the Pacific coast fauna. 



1) Cldridota discolor Eschscholtz. Sitka. 



2) Sytiapta iiihaeretis O. F. Müller. Puget Sound. Mendocino, Cal. 

 Pacific Grove, Cal. 



*S'. albicans Sel. is probably this species. 



3) Trochostoma arenicola (Stimpson). San Pedro, Cal. 



4) Cwcwmarm ö!/i^V/a (Brandt), Sitka. "California". Pacific Grove, 

 Cal. (?) 



Perhaps identical with C. populifer (Stimpson) . 



5) Cucumaria calcigera (Stimpson). Pacific Grove, Cal, 



6) - Chronhjehìii Théel. Vancouver's Island. 

 Sound. Pacific Grove, Cal. 



7) Cucumaria curata Co wies. Pacific Grove, Cal. 



8) - frondosa Gunner. San Francisco (Ayres 

 occurrence of this species on the Pacific coast is very doubtful 



9) Cucumaria lubrica (^lark. Puget Sound. Pacific Grove, Cal. 



Puget 



The 



